Power supply



FIG. 1 is a left side perspective view of a power supply of the present invention;

FIG. 2 is a right side perspective view of the power supply of FIG. 1;

FIG. 3 is a top view of the power supply of FIG. 1, the opposing side being a minor image thereof;

FIG. 4 is a front view of the power supply of FIG. 1, the opposing side being a minor image thereof; and,

FIG. 5 is a left side elevation view of the power supply of FIG. 1. 

The ornamental design for a power supply, as shown and described. 